Chart not updating, numeric readout does
I'm monitoring a temp and humidity sensor outside of my house using a ESP32. I have it update every 15 minutes. On my channel I have a chart and numeric readout. The readout shows me that it is updating every 15 minutes but the chart's last update was 2 hours ago. This was working until I went into the properties of the chart and changed the time base from daily to 12 hours. I have tried refreshing the page, signing out and back in as well as reboot the computer, still 2 hours behind. Is there something else I have to do to reestablish the chart?
Thanks John
6 Comments
Time Descending
What happens if you change the timescale to not selected (the first blank option when you select it in the chart options). I assume you mean the 'timescale' when you select the chart options from the pencil icon on your ThingSpeak field chart. If I got that wrong, can you please clarify?
Chris
That worked, I did click on the pencil to get to the parameters. I thought that it was on daily but it must have been on "not selected". The last point now is the same as the numeric readout. I assumed the Timescale let me modify the time base of the chart. Is that just showing me the last 12 hours, if that was what I selected, of the current chart, similar to zooming in on a section of a graph but does not actually modify the timebase of the chart. Is that correct?
Thanks for your help
You can see a description of the timescale parameter in the charts API documentation . Its a way to distill data from a device that oversamples the sensor. It takes the first data point in the time selected and skips the rest of the data.
That makes sense, similar to a zoom a section of an existing graph.
I probably should read some of that documentation but I'm a typical engineer who just plays around with it until it works. I have a sign on my work bench at home "Instructions are for people who can't figure it out"
Thanks again
We do both - we try really hard to make the interface intuitive and then write the best possible doc to help otherwise. :) The timescale parameter is one that isn't so obvious, we appreciate the feedback.
It really is easy to setup. I watched a couple of YouTube video about how to make a channel and link your project to it. I've worked on a number of other SCADA systems so some of what I did here was similar to those. I've also downloaded the app to my phone so I can monitor the variables there.
Thingspeak is a great way to get your data on internet without having to do any HTML coding
